/* SharkWire — base styles
   Palette: dark ocean + cyan only. No warm accents. */

:root {
  --color-base: #07131D;
  --color-raised: #0B2230;
  --color-border: #164052;
  --color-text: #E6F7FA;
  --color-muted: #9FC0C9;
  --color-signal: #21D4FD;
  --color-signal-hover: #67E8F9;

  --font-display: "Space Grotesk", ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-body: "Inter", ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;

  --container: 880px;
}

* {
  box-sizing: border-box;
}

html {
  color-scheme: dark;
}

body {
  margin: 0;
  background: var(--color-base);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.15;
  margin: 0;
}

p {
  margin: 0;
  color: var(--color-muted);
}

a {
  color: var(--color-signal);
}

/* Focus visibility — keep this generous; signal cyan on dark reads easily */
a:focus-visible,
button:focus-visible,
[tabindex]:focus-visible {
  outline: 2px solid var(--color-signal-hover);
  outline-offset: 3px;
  border-radius: 2px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--color-raised);
  color: var(--color-text);
  padding: 0.6rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  z-index: 100;
}

.skip-link:focus {
  left: 1rem;
  top: 1rem;
}

/* ---------- Ambient decoration ---------- */

.ambient {
  position: fixed;
  inset: 0;
  z-index: 0;
  overflow: hidden;
  pointer-events: none;
}

.ambient__lines {
  width: 100%;
  height: 100%;
  opacity: 0.22;
}

.ambient__path {
  fill: none;
  stroke: var(--color-signal);
  stroke-width: 1.4;
  stroke-linecap: round;
}

.ambient__path--a {
  animation: drift-a 28s ease-in-out infinite;
}

.ambient__path--b {
  stroke: var(--color-border);
  animation: drift-b 34s ease-in-out infinite;
}

.ambient__node {
  fill: var(--color-signal);
  opacity: 0.5;
  animation: pulse-node 6s ease-in-out infinite;
}

@keyframes drift-a {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(14px); }
}

@keyframes drift-b {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

@keyframes pulse-node {
  0%, 100% { opacity: 0.25; }
  50% { opacity: 0.65; }
}

@media (prefers-reduced-motion: reduce) {
  .ambient__path--a,
  .ambient__path--b,
  .ambient__node {
    animation: none !important;
  }
}

/* ---------- Layout ---------- */

.site-header,
main,
.site-footer {
  position: relative;
  z-index: 1;
}

.site-header {
  max-width: var(--container);
  margin: 0 auto;
  padding: 1.75rem 1.5rem 0.5rem;
  display: flex;
  align-items: center;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.brand__mark {
  color: var(--color-signal);
  flex-shrink: 0;
}

.brand__word {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.15rem;
  letter-spacing: 0.01em;
}

.hero {
  max-width: var(--container);
  margin: 0 auto;
  padding: 4.5rem 1.5rem 2.5rem;
}

.hero__headline {
  font-size: clamp(2.1rem, 5vw, 3.4rem);
  letter-spacing: -0.01em;
  max-width: 18ch;
}

.hero__supporting {
  margin-top: 1.25rem;
  font-size: clamp(1.05rem, 1.6vw, 1.25rem);
  max-width: 44ch;
  color: var(--color-muted);
}

.about {
  max-width: var(--container);
  margin: 0 auto;
  padding: 1.5rem 1.5rem 3rem;
  border-top: 1px solid var(--color-border);
}

.about h2 {
  font-size: 1.1rem;
  color: var(--color-text);
  margin-bottom: 1rem;
}

.about p {
  max-width: 62ch;
}

.about p + p {
  margin-top: 1rem;
}

.status {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 1.5rem 4rem;
}

.status__panel {
  background: var(--color-raised);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 1.5rem 1.75rem;
}

.status__row {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.status__row h2 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text);
}

.status__dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--color-signal);
  box-shadow: 0 0 0 3px rgba(33, 212, 253, 0.18);
  flex-shrink: 0;
}

.status__message {
  margin-top: 0.75rem;
  color: var(--color-muted);
  max-width: 56ch;
}

.site-footer {
  max-width: var(--container);
  margin: 0 auto;
  padding: 2rem 1.5rem 3rem;
  border-top: 1px solid var(--color-border);
}

.site-footer p {
  font-size: 0.9rem;
  color: var(--color-muted);
}

@media (min-width: 640px) {
  .site-header {
    padding-top: 2.25rem;
  }

  .hero {
    padding-top: 6rem;
  }
}